Fukuisaurus

Fukuisaurus:

The information on this rare dinosaur is based on parts of skulls of young dinosaurs . It had a short face and only 20 rows of teeth per jaw, which meant it was not fully grown . One unique feature of this plant eater was that it did not have a mobile skull . that is its upper and lower jaws did not ground up plants . Having an upper jaw that did not move was unusual for this kind of dinosaur..